Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

73°F

23°C

Humidity	71%
Wind Speed	NE 7 mph
Barometer	30.08 in (1018.4 mb)
Dewpoint	63°F (17°C)
Visibility	10.00 mi
Last update	4 Aug 8:52 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Catharpin VA

Today
High: 86 °F
Partly Sunny
Tonight
Low: 69 °F
Chance
Showers then
Showers
Likely and
Patchy Fog
Wednesday
High: 85 °F
Showers
Likely and
Patchy Fog
Wednesday Night
Low: 71 °F
Showers
Likely then
Slight Chance
Showers
Thursday
High: 90 °F
Mostly Sunny
then Slight
Chance
T-storms
Thursday Night
Low: 72 °F
Partly Cloudy
Friday
High: 90 °F
Mostly Sunny
then Chance
T-storms
Friday Night
Low: 70 °F
Chance
T-storms
Saturday
High: 89 °F
Mostly Sunny
then Showers
Likely

Detailed Forecast

Today

Partly sunny, with a high near 86. East wind 3 to 6 mph.

Tonight

A chance of showers and thunderstorms, then showers likely after 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 69. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday

Showers and thunderstorms likely, mainly before 3pm, then showers likely and possibly a thunderstorm after 4pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 85. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 71. South wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday

A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. South wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

Thursday Night

Partly cloudy, with a low around 72.

Friday

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 50%.

Friday Night

A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.

Saturday

Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 60%.

Saturday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

Sunday

A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 20%.

Sunday Night

Partly cloudy, with a low around 71.

Monday

Sunny, with a high near 92.